Preparation and properties of ethylene/POSS copolymer with rac-Et(Ind)2ZrCl2 catalyst

✍ Scribed by He-xin Zhang; Myung-sung Jung; Young-jun Shin; Keun-byoung Yoon; Dong-ho Lee

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 218 KB
• Volume: 111
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.29284

✦ Synopsis

Abstract

The various monovinyl‐functional polyhedral oligomeric silsesquioxane (POSS) monomers had been copolymerized with ethylene (E) using rac‐Et(Ind)~2~ZrCl~2~ and a modified methylaluminoxane (MMAO) cocatalyst. The unreacted POSS monomer could be removed completely by washing the copolymerization product with n‐hexane. And the copolymers were characterized with ^1^H NMR, TEM, DSC, TGA, and GPC to know the composition, thermal properties, molecular weight and its distribution, respectively. According to ^1^H NMR data, the monomer reactivity ratios of various POSS monomers were calculated by the Fineman‐Ross and Kelen‐Tudos methods. Thermogravimetric analysis of E/POSS copolymers exhibited an improved thermal stability with a higher degradation temperature and char yields, demonstrating that the inclusion of inorganic POSS nanoparticles made the organic polymer matrix more thermally robust. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2009